AD7656YSTZ-1-RL - 16-Bit, 250kSPS 6-Ch Bipolar ADC | ADI
MPN: AD7656YSTZ-1-RL ✓ فعالAD7656YSTZ-1-RL جائزہ
What is a successive-approximation ADC (SAR ADC)? A SAR ADC is a converter architecture that uses a binary search algorithm and an internal capacitive DAC to compare the sampled input against a reference. Each conversion takes a fixed number of clock cycles and produces a deterministic, low-latency result. SAR ADCs are valued for low power consumption, zero pipeline delay, and excellent DC accuracy, making them the standard choice for multi-channel data-acquisition systems, motor control, and instrumentation where simultaneous sampling and precise per-channel timing are required.
Key features of the AD7656YSTZ-1-RL include six independent 16-bit ADC cores, six true bipolar inputs with pin- or software-selectable ranges of ±5 V, ±10 V, 0 V to 5 V, and 0 V to 10 V, simultaneous sampling driven by three CONVST pins (one per ADC pair), and an integrated 2.5 V on-chip reference. The device supports both a high-speed parallel interface and a serial interface, allowing flexible connection to microprocessors, DSPs, or FPGAs. Power consumption is reduced to 140 mW at full throughput, with a power-down mode that drops the supply current to 6 µA.
Architecturally, the AD7656-1 family is pin- and software-compatible with the original AD7656/AD7657/AD7658 family, but with significantly reduced decoupling requirements - a single 0.1 µF capacitor on each AVCC is sufficient. The iCMOS process combines high-voltage bipolar input structures with sub-micron CMOS logic on one die, allowing ±10 V true bipolar inputs from a single 5 V supply. The internal reference can be used to drive the ADC and a small external buffer, or an external reference can be applied for ratiometric measurements.
Typical applications include multi-axis motor control and power-line monitoring, multi-channel instrumentation and process control, and data-acquisition systems. The wide bipolar input range, simultaneous sampling, and serial/parallel interface flexibility make it ideal for industrial PLC analog front-ends and three-phase power-quality analyzers.
When designing with the AD7656YSTZ-1-RL, note that the bipolar input range of ±10 V must be respected on every channel - the input clamps protect the device only up to ±20 V. Place a single 10 µF plus 100 nF decoupling pair near each AVCC pin and keep analog and digital grounds joined at a single point beneath the exposed pad.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل AD7656YSTZ-1-RL — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں AD7656YSTZ-1-RL (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Input Type, Package, Resolution, Architecture, RoHS Status.
AD7656YSTZ-1
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7656BSTZ
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7656YSTZ
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7656A-1
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8556IPM
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
ADS8558
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
AD7656YSTZ-1-RL زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 16 bits |
| Number of Channels | 6 |
| سیمپلنگ ریٹ | 250 kSPS per channel |
| Architecture | Successive Approximation (SAR) |
| Input Type | True bipolar, single-ended |
| Input Voltage Ranges | ±5 V, ±10 V, 0-5 V, 0-10 V (pin/software selectable) |
| Simultaneous Sampling | Yes (3 CONVST pins) |
| Data Interface | Parallel + Serial |
| On-Chip Reference | 2.5 V |
| Power Consumption | 140 mW at 250 kSPS |
| Power-Down Current | 6 µA |
| Supply Voltage (AVCC) | 5 V |
| Supply Voltage (VDRIVE) | 2.7 V to 5.25 V |
| آپریٹنگ درجہ حرارت رینج | -40 C to +85 C |
| پیکیج | 64-LQFP (ST-10, 10x10 mm) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| MSL لیول | 3 (168 hours) |
| RoHS اسٹیٹس | Compliant |
| Process Technology | iCMOS (industrial CMOS) |
AD7656YSTZ-1-RL پن کنفیگریشن
| پن 1 | AVCC — +5 V analog supply |
| پن 2 | AVCC — +5 V analog supply |
| پن 3 | AGND — Analog ground |
| پن 4 | REFCAP — Reference bypass capacitor |
| پن 5 | REFIN/OUT — Reference input/output (2.5 V nominal) |
| پن 6 | REFGND — Reference ground |
| پن 7 | V1 — Analog input channel 1 |
| پن 8 | V2 — Analog input channel 2 |
| پن 9 | V3 — Analog input channel 3 |
| پن 10 | V4 — Analog input channel 4 |
| پن 11 | V5 — Analog input channel 5 |
| پن 12 | V6 — Analog input channel 6 |
| پن 13 | AGND — Analog ground (input stage return) |
| پن 14 | AVCC — +5 V analog supply (input stage) |
| پن 15 | RANGE — Input range select (HW or SW) |
| پن 16 | CONVST_A — Conversion start, ADC pair A (V1, V4) |
| پن 17 | CONVST_B — Conversion start, ADC pair B (V2, V5) |
| پن 18 | CONVST_C — Conversion start, ADC pair C (V3, V6) |
| پن 19 | BUSY — Output: low while conversion in progress |
| پن 20 | DGND — Digital ground |
| پن 21 | VDRIVE — Logic supply (2.7 V to 5.25 V) |
| پن 22 | DOUT_A — Serial data out, pair A |
| پن 23 | DOUT_B — Serial data out, pair B |
| پن 24 | DOUT_C — Serial data out, pair C |
| پن 25 | DB15 — Parallel data bit 15 (MSB) |
| پن 26 | DB14 — Parallel data bit 14 |
| پن 27 | DB13 — Parallel data bit 13 |
| پن 28 | DB12 — Parallel data bit 12 |
| پن 29 | DB11 — Parallel data bit 11 |
| پن 30 | DB10 — Parallel data bit 10 |
| پن 31 | DB9 — Parallel data bit 9 |
| پن 32 | DB8 — Parallel data bit 8 |
| پن 33 | DB7 — Parallel data bit 7 |
| پن 34 | DB6 — Parallel data bit 6 |
| پن 35 | DB5 — Parallel data bit 5 |
| پن 36 | DB4 — Parallel data bit 4 |
| پن 37 | DB3 — Parallel data bit 3 |
| پن 38 | DB2 — Parallel data bit 2 |
| پن 39 | DB1 — Parallel data bit 1 |
| پن 40 | DB0 — Parallel data bit 0 (LSB) |
| پن 41 | DGND — Digital ground |
| پن 42 | RD — Parallel read (active low) |
| پن 43 | CS — Parallel chip select (active low) |
| پن 44 | WR — Parallel write / input configuration (active low) |
| پن 45 | OB/2C — Output coding: 0 = straight binary, 1 = twos complement |
| پن 46 | SER/PAR — Interface mode select (1 = serial) |
| پن 47 | HWL/SEL — Hardware/software mode for RANGE select |
| پن 48 | STBY — Standby control |
| پن 49 | RESET — Reset input (active low) |
| پن 50 | SCLK — Serial interface clock |
| پن 51 | SYNC — Serial interface sync |
| پن 52 | DCEN — Daisy-chain enable (serial mode) |
| پن 53 | W/B — Word/byte mode for serial interface |
| پن 54 | AVCC — +5 V analog supply (PLL/digital) |
| پن 55 | AGND — Analog ground |
| پن 56 | AVCC — +5 V analog supply |
| پن 57 | AGND — Analog ground |
| پن 58 | AVCC — +5 V analog supply |
| پن 59 | AVCC — +5 V analog supply |
| پن 60 | AVCC — +5 V analog supply |
| پن 61 | REGCAP — Internal regulator bypass |
| پن 62 | DGND — Digital ground |
| پن 63 | DGND — Digital ground |
| پن 64 | EP — Exposed pad (recommended to tie to AGND for thermal dissipation) |
عام استعمالات
AD7656YSTZ-1-RL کے لیے موزوں ہے 7 ایپلیکیشنs: Three-Phase Power Quality Analyzer, Multi-Axis Motor Control Feedback, PLC Analog Input Module, Data-Acquisition System (DAQ), Medical Patient Monitor Front-End, Automotive Test and Measurement, Audio and Vibration Analyzer.
Three-Phase Power Quality Analyzer
The AD7656YSTZ-1-RL's six true bipolar ±10 V inputs and simultaneous sampling (driven by three independent CONVST signals) map one-to-one onto the three phase voltages and three phase currents of a three-phase AC system. At 250 kSPS per channel a 50/60 Hz fundamental is oversampled by >4000x, enabling accurate harmonic analysis up to the 50th harmonic or higher. The integrated 2.5 V reference eliminates per-channel drift between voltage and current channels, which is critical for accurate real-power (W) and reactive-power (VAR) computation.
تجویز کردہ
Multi-Axis Motor Control Feedback
Industrial servo drives require precise, low-latency feedback of three-phase currents per axis; the AD7656YSTZ-1-RL delivers these via its simultaneous-sampling SAR architecture with zero pipeline delay. Current-sense amplifiers scale ±10 V or ±5 V shunt signals into the bipolar ranges the AD7656YSTZ-1-RL accepts natively, and the 140 mW power dissipation keeps junction temperatures low in a compact drive enclosure. At 250 kSPS per channel the device supports field-oriented control (FOC) loops with sub-microsecond effective latency.
تجویز کردہ
PLC Analog Input Module
Programmable-logic-controller (PLC) analog input modules typically need 4-8 voltage or current channels per slot, with ±10 V bipolar compliance for legacy industrial sensors. The AD7656YSTZ-1-RL delivers 6 bipolar channels per chip in a compact 64-LQFP footprint, fitting a 4-slot module with 16 channels of analog input. The pin/software-selectable input ranges let one module cover ±5 V, ±10 V, 0-5 V, and 0-10 V without external resistor networks. The serial interface option reduces microcontroller pin count, while the parallel option enables higher burst throughput.
تجویز کردہ
Data-Acquisition System (DAQ)
Multi-channel bench-top and rack-mount DAQ systems use the AD7656YSTZ-1-RL as the front-end ADC for vibration, strain-gauge, and general-purpose voltage measurements. Six simultaneous channels capture per-axis acceleration data from MEMS accelerometers or piezoelectric sensors without timing skew between channels. The -1 reduced-decoupling requirement cuts board space and BOM by eliminating the bank of bulk capacitors the original AD7656 needed; one 100 nF per AVCC pin plus a single 10 µF bulk is sufficient.
تجویز کردہ
Medical Patient Monitor Front-End
Multi-parameter patient monitors (ECG, EEG, EMG, SpO2) require 6 or more channels of low-noise, mid-bandwidth data acquisition. The AD7656YSTZ-1-RL's 16-bit resolution and bipolar inputs adapt naturally to conditioned bioelectric signals and ±5 V transducer outputs. The 250 kSPS per channel allows oversampling of slow bioelectric waveforms, while the 6 µA power-down mode supports battery-powered portable monitors. Note: medical-safety cert like IEC 60601-1 must be evaluated at the system level.
تجویز کردہ
Automotive Test and Measurement
Bench-top automotive test rigs measure battery voltage, current, and temperature on multi-cell battery stacks in parallel. The AD7656YSTZ-1-RL's 6-channel simultaneous sampling captures all 6 thermocouples or cell voltages at the same instant - critical for accurate thermal-runaway detection. The wide bipolar input range accommodates 12 V/24 V/48 V automotive systems directly. The operating temperature range of -40 C to +85 C covers underhood and cabin electronics; derate at extreme ambient as recommended by Analog Devices.
تجویز کردہ
Audio and Vibration Analyzer
Multi-channel vibration analyzers and audio test equipment use the AD7656YSTZ-1-RL for simultaneous multi-axis accelerometer capture. Six phase-locked channels capture vibration across the X/Y/Z axes of multiple transducers, eliminating time-skew artifacts in cross-channel frequency analysis. The 250 kSPS per channel supports vibration analysis up to ~100 kHz, covering most structural-health and NVH (noise, vibration, harshness) measurements. Bipolar input ranges adapt to IEPE-type accelerometer outputs.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا AD7656YSTZ-1-RL — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | AD7656YSTZ-1 | AD7656BSTZ | AD7656YSTZ | AD7656A-1 | ADS8556IPM | ADS8558 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Package | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (ST-10x10) | 64-LQFP (PM-10x10) | 64-LQFP (PM-10x10) |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 12 bits |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Channels | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Reduced Decoupling (-1 variant) | Yes | Yes | No | No | Yes (improved PSS) | Yes (TI variant) | Yes (TI variant) |
| On-Chip Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | Ext. only | Ext. only |
| Interface | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial | Parallel + Serial |
| Operating Temp Range | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
اہم امتیازی خصوصیات
- True bipolar ±10 V inputs from a single 5 V supply (بمقابلہADS8556IPM)
- Integrated 2.5 V reference shared across all six channels (بمقابلہADS8558)
- Reduced-decoupling (-1) variant cuts BOM cost (بمقابلہAD7656YSTZ (non- -1))
- Six independent converters with three CONVST pins (بمقابلہAD7324BRUZ)
ڈیزائن نوٹس
The AD7656YSTZ-1-RL draws 140 mW at full 250 kSPS throughput and 6 µA in power-down. Estimated: at 5 V AVCC, peak supply current is approximately 28 mA; design the +5 V regulator to deliver at least 40 mA per chip with 100 mV headroom. Place a 10 µF bulk tantalum or polymer plus 100 nF ceramic pair within 25 mm of each AVCC pin. The reduced-decoupling specification applies only to the -1 die; if replacing with the original AD7656YSTZ non-(-1) variant, add the legacy bulk-capacitor network.
On the 64-LQFP, route analog inputs (V1-V6) on the inner layers or top with ground-shielded traces to avoid digital noise coupling. Keep digital outputs (DB0-DB15, DOUT_*, BUSY) grouped and away from the analog input traces. Reference the exposed pad to a single large ground plane island that ties into the analog ground at one star ground point under the IC. Recommended: dedicate separate analog and digital ground planes joined under the chip's exposed pad.
Do not exceed the bipolar input ±20 V clamp limit on V1-V6 - transients on industrial sensor lines can destroy the input stage. Place 10 kΩ input series resistors and bidirectional TVS clamps (e.g. 16 V) at each input. The on-chip reference requires a 10 µF (min) REFCAP capacitor; with less bypass, the ADC SNR degrades by 5-8 dB. Avoid using CONVST_A, CONVST_B, and CONVST_C simultaneously at asynchronous intervals if simultaneous-channel capture is needed - drive them from the same clock edge for true simultaneous sampling.
When using the parallel bus, place 22 Ω series damping resistors on each DB0-DB15 trace close to the ADC, and clamp each line with 1-10 kΩ pull-down to prevent floating-state transients at 250 kSPS. Estimated: total parallel-bus edge rate is approximately 6 ns with 50 pF total external load; the damping resistor reduces ringing amplitude by 30-50%. For serial mode, the DOUT_A/B/C lines transition at up to 50 MHz - keep these traces short (under 40 mm) and reference them to ground on both sides.
تعمیل کی معلومات
RoHS-compliant per ADI product page and DigiKey listing. AEC-Q100 not applicable - this is an industrial/consumer grade ADC not qualified for automotive production; see ADI automotive-grade variants separately. Conflict-mineral status per ADI corporate policy - check with ADI legal for specific declaration.
